71311673 has 4 divisors (see below), whose sum is σ = 72970128. Its totient is φ = 69653220.

The previous prime is 71311663. The next prime is 71311679. The reversal of 71311673 is 37611317.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37611317 = 19 ⋅1979543.

It is a cyclic number.

It is not a de Polignac number, because 71311673 - 2⁴ = 71311657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71311679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829163 + ... + 829248.

It is an arithmetic number, because the mean of its divisors is an integer number (18242532).

Almost surely, 2^71311673 is an apocalyptic number.

It is an amenable number.

71311673 is a deficient number, since it is larger than the sum of its proper divisors (1658455).

71311673 is a wasteful number, since it uses less digits than its factorization.

71311673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658454.

The product of its digits is 2646, while the sum is 29.

The square root of 71311673 is about 8444.6239111046. The cubic root of 71311673 is about 414.6867971184.

The spelling of 71311673 in words is "seventy-one million, three hundred eleven thousand, six hundred seventy-three".